1 /*
2 * Author: Zion Orent <zorent@ics.com>
3 * Copyright (c) 2015 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <iostream>
26 #include <string>
27 #include <stdexcept>
28
29 #include "grovegsr.h"
30
31 using namespace upm;
32 using namespace std;
33
GroveGSR(int pin)34 GroveGSR::GroveGSR(int pin)
35 {
36 if ( !(m_aio = mraa_aio_init(pin)) )
37 {
38 throw std::invalid_argument(std::string(__FUNCTION__) +
39 ": mraa_aio_init() failed, invalid pin?");
40 return;
41 }
42 }
43
~GroveGSR()44 GroveGSR::~GroveGSR()
45 {
46 mraa_aio_close(m_aio);
47 }
48
calibrate()49 void GroveGSR::calibrate()
50 {
51 sleep(1);
52 int val, threshold, sum = 0;
53
54 for(int i=0; i<500; i++)
55 {
56 val = mraa_aio_read(m_aio);
57 sum += val;
58 usleep(5000);
59 }
60 threshold = sum / 500;
61 cout << "Threshold = " << threshold << endl;
62 }
63
value()64 int GroveGSR::value()
65 {
66 int val = mraa_aio_read(m_aio);
67 return val;
68 }
69